Operating and Maintenance Instructions
EN
DC.16DEX
14
www.dvp.it
8702042 – 01/10/2014 – R.4
6
MAINTENANCE
6.1
GENERAL WARNINGS
For good maintenance:
•
Immediately verify the causes of any malfunctions (excessive noise, overheating, etc.);
•
Pay particular attention to safety devices;
•
Make use of all documentation provided by the manufacturer (instruction manuals, wiring diagrams, etc.);
•
Use only appropriate tools and original spare parts.
In the event of a failure to understand the information or procedures contained in this chapter, contact D.V.P.
Vacuum Technology s.p.a. for clarification before proceeding.
Only trained or authorised personnel have the necessary expertise to perform tasks with the
technique appropriate for intervention. In particular, the personnel must have the necessary
expertise relating to ATEX classified systems.
HAZARD
Do not perform any type of operation, modification and/or repair of any kind, except for those
listed in this manual.
HAZARD
All maintenance operations must be carried out with the pump disconnected from any power
sources. Do not operate the pump until it has reached a temperature that is not dangerous for
the operator.
HAZARD
If pump maintenance has been performed in a manner inconsistent with instructions, with
non-original spare parts or otherwise so as to impair its integrity or modify its characteristics,
D.V.P. Vacuum Technology s.p.a. will be released from any liability relating to the safety of
persons and malfunction of the pump.
6.2
MAINTENANCE TABLE
The following table shows all required periodic operations to maintain pump efficiency.
OPERATION TYPE
FREQUENCY
OPERATOR
QUALIFICATION
Check the oil level and pump noise
24 h
Change oil
500 h
Check and clean gas ballast
1000 h
Clean motor fan guard and clean pump
1000 h
Change vanes
10000 h
Shorter maintenance intervals may be required according to operating conditions (high temperature of intake gases,
intake gases containing condensable vapours, etc.).
6.2.1
CHECK OIL LEVEL
Check that oil level is at mid-range of the oil sight glass. If not, see instructions in the following paragraph.
Check oil conditions. When dark, cloudy or emulsified, oil has been contaminated by intake substances. If the
condition does not change even after having carried out the decontamination procedure (see point 5.1.3 “Oil
cleaning” in this manual), replace the oil following the instructions given in point 6.2.2 “Change oil” in this manual.
Check that no odd noises are caused during the normal functioning of the pump; otherwise find and eliminate the
cause. For any questions please contact D.V.P. Vacuum Technology s.p.a. customer service.